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- /* SPDX-License-Identifier: GPL-2.0+ */
- /*
- * Thumb-1 drop-in for the linux/include/asm-arm/proc-armv/system.h
- *
- * (C) Copyright 2015
- * Albert ARIBAUD <albert.u.boot@aribaud.net>
- *
- * The original file does not build in Thumb mode. However, in U-Boot
- * we don't use interrupt context, so we can redefine these as empty
- * memory barriers, which makes Thumb-1 compiler happy.
- */
- /*
- * Use the same macro name as linux/include/asm-arm/proc-armv/system.h
- * here, so that if the original ever gets included after us, it won't
- * try to re-redefine anything.
- */
- #ifndef __ASM_PROC_SYSTEM_H
- #define __ASM_PROC_SYSTEM_H
- /*
- * Redefine all original macros with static inline functions containing
- * a simple memory barrier, so that they produce the same instruction
- * ordering constraints as their original counterparts.
- * We use static inline functions rather than macros so that we can tell
- * the compiler to not complain about unused arguments.
- */
- static inline void local_irq_save(
- unsigned long flags __attribute__((unused)))
- {
- __asm__ __volatile__ ("" : : : "memory");
- }
- static inline void local_irq_enable(void)
- {
- __asm__ __volatile__ ("" : : : "memory");
- }
- static inline void local_irq_disable(void)
- {
- __asm__ __volatile__ ("" : : : "memory");
- }
- static inline void __stf(void)
- {
- __asm__ __volatile__ ("" : : : "memory");
- }
- static inline void __clf(void)
- {
- __asm__ __volatile__ ("" : : : "memory");
- }
- static inline void local_save_flags(
- unsigned long flags __attribute__((unused)))
- {
- __asm__ __volatile__ ("" : : : "memory");
- }
- static inline void local_irq_restore(
- unsigned long flags __attribute__((unused)))
- {
- __asm__ __volatile__ ("" : : : "memory");
- }
- #endif /* __ASM_PROC_SYSTEM_H */
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